JPH0814025A - Exhaust gas treating device in internal combustion engine - Google Patents

Abstract

PURPOSE:To treat drain water generated in an exhaust gas heat exchanger without using a drainage. CONSTITUTION:A drain water tank 9 is arranged in the lower part of an exhaust gas heat exchanger 3, drain water generated in the exhaust gas heat exchanger 3 is stored in the drain water tank 9 via a drain pipe 8 with an oil filter 10, and the drain water is heated by a drain water evaporator 11 so as to be evaporated and diffused in the atmosphere.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for treating exhaust gas discharged from an internal combustion engine such as a gas engine, a gasoline engine, a diesel engine or the like.

[0002]

2. Description of the Related Art Since the temperature of exhaust gas discharged from an internal combustion engine usually reaches about 500 to 600 ° C. at the outlet of the engine, for example, a so-called stationary type driving a generator or heat pump cycle by the internal combustion engine is used. In this case, the exhaust gas is led to an exhaust gas heat exchanger, where it is cooled by cooling water,
A method is adopted in which the temperature is lowered to about 0 to 200 ° C. and then it is released into the atmosphere.

FIG. 2 illustrates this conventional system, in which 1 is an engine, 2 is an exhaust gas conduit, 3 is an exhaust gas heat exchanger, 4 is a cooling water circulation passage, 5 is a radiator, and 6 is a radiator.
Is a circulation pump, 7 is an exhaust stack, 8 is a drain water pipe,
The hot exhaust gas from the engine 1 is fed to the exhaust gas heat exchanger 3
In the above, the cooling water is circulated through the cooling water system passage 4 and is diffused into the atmosphere from the exhaust pipe 7 at about 100 to 200 ° C.

[0004]

However, the above exhaust gas treatment device has the following drawbacks. a. When the exhaust gas is cooled by the exhaust gas heat exchanger 3, water in the exhaust gas is condensed and discharged as drain water. Therefore, when there is no treatment place such as a drain groove near the engine 1, Drain water piping must be installed far. b. Since the drain water is acidic because it contains nitrogen oxides in the exhaust gas, it is necessary to install a neutralizer in the middle of the drain water pipe for neutralization. c. Since engine oil is contained in the drain water, there is a risk of wastewater pollution. An object of the present invention is to propose an exhaust gas treatment device for an internal combustion engine that solves the problems described in ac above.

[0005]

The structure of an exhaust gas treatment device in an internal combustion engine according to the present invention is as follows.

1. In an exhaust gas treatment device that guides the exhaust gas generated in an internal combustion engine to an exhaust gas heat exchanger, where it is cooled to a certain temperature with cooling water and diffused into the atmosphere, evaporative water is discharged below the exhaust gas heat exchanger. A drain water tank with a diffusion tube was installed, and a drain water pipe was connected between the drain water tank and the exhaust gas heat exchanger, an oil filter was attached to a part of the drain water pipe, and the drain water tank A heat dissipation part is inserted into the exhaust gas passage, and a heat absorption part is attached to the exhaust gas passage connecting the internal combustion engine and the exhaust gas heat exchanger to transfer the heat of the hot exhaust gas to the drain water in the drain water tank to evaporate the drain water. An exhaust gas treatment device for an internal combustion engine, comprising: a drain water evaporation device that disperses the evaporated water into an atmosphere from an evaporated water diffusion cylinder.

2. The exhaust gas treatment device for an internal combustion engine according to the above 1, wherein a heat pipe is used as a drain water evaporation device.

[0008]

The exhaust gas from the internal combustion engine is cooled by the cooling water in the exhaust gas heat exchanger and then released into the atmosphere via the exhaust stack. In this process, drain water generated in the heat exchanger flows into the drain water tank via the drain water pipe and the oil filter, and is stored there. On the other hand, the heat absorption part of the drain water evaporator absorbs the high temperature exhaust gas heat, guides this heat to the heat dissipation part in the drain water tank, and releases it to give heat to the drain water to evaporate the drain water. . The evaporated drain water is diffused into the atmosphere via the evaporated water diffusion tube. The oil filter attached to the drain water pipe should be cleaned or replaced with a new one according to the dirt.

[0009]

FIG. 1 illustrates an embodiment of the present invention. This Figure 1
In the figure, 1 is a gas engine, 2 is an exhaust gas conduit, 3 is an exhaust gas heat exchanger, 4 is a cooling water circulation system path, 5 is a radiator, 6 is a circulation pump, 7 is an exhaust pipe, and 8 is a drain water pipe.

A drain water tank 9 is connected to the drain water pipe 8. The drain water generated in the exhaust gas heat exchanger 3 is stored in the drain water tank 9. 1
Reference numeral 0 is an oil filter for removing the oil component in the drain water, which is replaceable.

Reference numeral 11 denotes a drain water evaporation device. In this drain water evaporation device 11, a heat absorption part 12 is attached to a portion near the exhaust gas outlet of the engine 1, and a heat radiation part 13 is inserted into the drain water tank 9. It is composed of a heat pipe, the high temperature exhaust gas heat of 500 to 600 ° C. is transferred to the drain water in the heat pipe cycle to evaporate the drain water, and this vapor is attached to the drain water tank 9
4. Dissipate into the atmosphere.

[0012]

The present invention is constructed as described above and has the following effects. a. Since the drain water in the exhaust gas heat exchanger is temporarily stored in the drain water tank and then evaporated, it is not necessary to provide a drain water drain pipe in the fixed-field internal combustion engine. b. Since high temperature exhaust gas heat is used as the heat source for evaporation, it is not necessary to separately obtain a heat source for evaporation. c. There is no need to install a neutralizer because the drain water is not drained to drains. d. Since the oil contained in the drain water is removed with an oil filter, there is no concern about wastewater pollution.

[Brief description of drawings]

FIG. 1 is an explanatory diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of a conventional exhaust gas treatment device for a fixed engine.

[Explanation of symbols]

 1 Gas Engine 2 Exhaust Gas Conduit 3 Exhaust Gas Heat Exchanger 4 Cooling Water Circulation System 5 Radiator 6 Circulation Pump 7 Exhaust Cylinder 8 Drain Water Pipe 9 Drain Water Tank 10 Oil Filter 11 Drain Water Evaporator 12 Heat Absorber 13 Radiator 14 Evaporated Water Emission tube

Claims (2)

[Claims] 1. An exhaust gas heat exchanger in which an exhaust gas generated in an internal combustion engine is introduced into an exhaust gas heat exchanger, where the exhaust gas is cooled to a certain temperature or lower by cooling water and diffused into the atmosphere. A drain water tank with an evaporative water diffusion tube is installed below, and a drain water pipe is connected between the drain water tank and the exhaust gas heat exchanger, an oil filter is attached to a part of the drain water pipe, A heat dissipation part is inserted into the drain water tank, and a heat absorption part is attached to the exhaust gas passage connecting the internal combustion engine and the exhaust gas heat exchanger to transfer the heat of the high-temperature exhaust gas to the drain water in the drain water tank. An exhaust gas treatment device for an internal combustion engine, comprising: a drain water evaporation device that evaporates drain water and disperses it into the atmosphere from an evaporative water diffusion tube. 2. The exhaust gas treatment device for an internal combustion engine according to claim 1, wherein a heat pipe is used as the drain water evaporation device.